Mark Webber says Red Bull don't know how competitive they might be in the Malaysian GP

Mark Webber says Red Bull don't know just how competitive they might be in Sunday's Malaysian Grand Prix.

The heat might be a constant but not so the precipitation: Webber was speaking after a qualifying session which featured a heavy rain shower during session two. As a result, Q3 took place on a rapidly drying - steaming even - track, something which Webber said would pose another headache if more rain fell during the race. "Even the inters are getting a hard time when the track is ramping in and out of dry sections. You can have a part of the track that can't take the slicks and the crossover is not quite ready," he said. "We have to think on the fly tomorrow, think on our feet, think how the race is going to unfold. "I'll try and buy some more tyres on my way to the track tomorrow morning." When it comes to making the right call, Webber speaks already from rueful experience. Come crunchtime he, unlike Vettel, elected to stay out on the same intermediates rather than pit for a fresh set. He then tried, and failed, to make the chequered flag to start another flying lap on a track that was rapidly drying. Even if he had made it, though, Webber guessed that he wouldn't have bested his team-mate. "To get the absolute maximum lap time another set of inters was probably the right thing to do, but it wasn't completely clear," he added. "I was saving my inters for that last run at the end but basically the information I had for when the session was going to finish was a little bit different to what I thought, so in the end I got the flag and I wasn't expecting the flag. It was a double whammy because the track was obviously ramping in a lot. "We certainly could have laid down a stronger time but whether it was enough; if you look at the scrubbed prime against the new prime, toe-to-toe in the same conditions, I was probably going to struggle against Seb."